#include<stdio.h>
#include<stdlib.h>

int main()
{
    int n;
    long x;
    scanf("%d %ld", &n, &x);
    long *a = 0;
    a = (long*)malloc(n * sizeof(long));
    for (int i = 0; i < n; i++)
    {
        scanf("%ld", &a[i]);
    }
    int j = 0;
    for (j = 0; j < n; j++)
    {
        if(a[j] == x)
        {
            break;
        }
    }
    if (j == n)
    {
        printf("Not Found");
    }
    else
    {
        printf("%d", j);
    }
    free(a);
    
    return 0;
}